I have stihl FS90 weed trimmer with lots and lots of hours on it. It always started and ran very good. I used unoxygenated gas for mixing always. This summer it would start and when switching off choke it would die and then would not restart no matter what. I would wait a week and same scenario.
Compression is 85 PSI. Spark is good and consistent. Plug would always seem wet with gas. I replaced new Carb, spark plug, fuel filter, air filter, both plastic caps from fuel tank to carb with associated "o" rings. I did use same rubber lines, but couldn't see any defects in them. It started today and ran about 5 sec and then nothing.
I'm stumped. Any help would be appreciated.
tks,
Gary
Compression is 85 PSI. Spark is good and consistent. Plug would always seem wet with gas. I replaced new Carb, spark plug, fuel filter, air filter, both plastic caps from fuel tank to carb with associated "o" rings. I did use same rubber lines, but couldn't see any defects in them. It started today and ran about 5 sec and then nothing.
I'm stumped. Any help would be appreciated.
tks,
Gary